14 papers · ranked by Valyu relevance
M. Torabi Rad, G. Boussinot, M. Apel
The mechanical strength of a polycrystalline material can be drastically weakened by a phenomenon known as grain boundary (GB) premelting that takes place, owing to the so-called disjoining potential, when the dry GB free energy $\sigma _{gb}$ exceeds twice the free energy of the solid-liquid interface $\sigma _{sl}$.…
Yang Yang, Mark Asta, Brian B. Laird
We report the observation of a premelting transition at chemically sharp solid-liquid interfaces using molecular-dynamics simulations. The transition is observed in the solid-Al/liquid-Pb system and involves the formation of a liquid interfacial film of Al with a width that grows logarithmically as the bulk melting…
Hye-Sung Kim, Ji-Sang An, Hyung Bin Bae, Sung-Yoon Chung
Since two major criteria for melting were proposed by Lindemann and Born in the early 1900s, many simulations and observations have been carried out to elucidate the premelting phenomena largely at the crystal surfaces and grain boundaries below the bulk melting point. Although dislocations and clusters of vacancies…
Limin Zeng, Ang Gao
The premelting layer at the ice-air interface plays critical roles in atmospheric chemical and physical processes. Traditional approaches to study this layer—experimental methods, classical simulations, and even first-principles simulations—face significant limitations in accuracy and scalability. Addressing these…
Zun Liang, Han Du, Hongtao Liang, Yang Yang
We employ molecular-dynamics (MD) simulations to study grain boundary (GB) premelting in ices confined in two-dimensional hydrophobic nano-channels. Premelting transitions are observed in symmetric tilt GBs in monolayer ices and involve the formation of a premelting band of liquid phase water with a width that grows…
Shifan Cui, Haoxiang Chen
The premelting of ice is well known, but little is known about how the premelted and solid surfaces convert to each other. In this work, the transition dynamics between two phases are revealed with large‐scale molecular dynamics simulations. Supercooling and superheating states exist in the transition, and are overcome…
Michał Pocheć, Katarzyna M. Krupka, Jarosław J. Panek, Kazimierz Orzechowski + 2 more
'Kazimierz Orzechowski' 'Aneta Jezierska' 'Adrian Daniel Boese'] The experimental and theoretical description of premelting behavior is one of the most challenging tasks in contemporary material science. In this paper, n-octanol was studied using a multi-method approach to investigate it at macroscopic and molecular…
Qi Zhang, Wei Li, Kaiyao Qiao, Yilong Han
The nature of liquid-to-glass transition is a major puzzle in science. A similar challenge exists in glass-to-liquid transition, i.e., glass melting, especially for the poorly investigated surface effects. Here, we assemble colloidal glasses by vapor deposition and melt them by tuning particle attractions. The…
Zhongyu Zhao, Junxue Zhao, Zexin Tan, Boqiao Qu + 2 more
'Yaru Cui'] The melting point and volatilization characteristics of a fluorine-containing slag were investigated under different heating rates and premelting processes. The “hemisphere method” was used to detect the melting point, and the results showed that the measurements for the fluorine-free slag increased with…
A. Danzig, Ori Scaly, E. Polturak
Melting of 3D solids is often preceded by a melting of their surface, a distinct process which begins at a temperature lower than TM. Until now, surface melting was investigated mostly by diffraction or other non-contact techniques, revealing how the surface becomes progressively disordered with temperature. We…
Philipp Drescher, Mohamed Sarhan, Hermann Seitz, Jai-Sung Lee
Selective electron beam melting (SEBM) is a relatively new additive manufacturing technology for metallic materials. Specific to this technology is the sintering of the metal powder prior to the melting process. The sintering process has disadvantages for post-processing. The post-processing of parts produced by SEBM…
Joamin Gonzalez-Gutierrez, Santiago Cano, Stephan Schuschnigg, Christian Kukla + 2 more
'Christian Kukla' 'Janak Sapkota' 'Clemens Holzer'] Additive manufacturing (AM) is the fabrication of real three-dimensional objects from metals, ceramics, or plastics by adding material, usually as layers. There are several variants of AM; among them material extrusion (ME) is one of the most versatile and widely…
Weigang Lu, Rohil Kayastha, Blake Birmingham, Bernd Zechmann + 1 more
Plasmonic heating has been utilized in many applications, including photocatalysis, photothermal therapy, and photocuring. However, the heat dissipation process of the plasmonic nanoparticles (NPs) and the surrounding matrix is complex. How high the temperature of the matrix that surrounds the plasmonic NPs, such as…
Jun Cao, Jie Xia, Xiaoyu Shen, Kexing Song + 3 more
'Chengqiang Cui' 'Gábor Harsányi'] Tungsten is a metal with many unique characteristics, such as a high melting point, high hardness, high chemical stability, etc. It is widely used in high-end manufacturing, new energy, the defense industry, and other fields. However, tungsten also has room-temperature brittleness…